Building-screed.



J. H. JOHNSN.

BULDING SCREED. APPLICATION FILED nzc.5.

ISH.

Patented Mar. 12, 1918.

JOHN H. doHNsoN mmm@ %MM cos:

PA NT FE`QED JOHN H. JOHNSON, OF OMA I-IA, NEBRASKA;

BUILDING-SCREED.

Application filed December 5, 1917.

To all whom it may camera.-

Be it known that I, JOHN H. JoHNsoN, a citizen of the United States,residing in the city of Omaha, County of Douglas, and State of Nebraska,have invented certain .new and useful Improvements in Building- Screedsand have described the same in the foll wing specification, illustratedby the accompanying drawings. i

My invention relates' to that class of screeds which are commonlyatlixed to concrete, tile or brick walls or partitions of buildings,before plastering, as grounds for the subsequent attachment of casings,moldings and other wall strips, and which individually comprse a. blockof fibrous or other suitable material. It is the main objcct of theinvention to simplify the con struction, and reduce the cost ofmanufacture, of such screeds, while preserving their effectiveness; andin general to produce a superior screed of the specified class. Toaccomplish this object I make my improved screed in the form of anoblong flat plate which has terminal shoulders and 'is grooved in aspecial manner.

in said drawings, illustrating the best manner in which I havecontemplatcd applying the principles of the in vention, Figure l is aplan of a screed Whicl' is constructed in accordance with theseprinciples. Fig. 2 is a central transverse section of the same on eitherof the section lines 2-2 in Fig. l. Fig. 3 is a sectional elevationshowing in broken and full lines two of my improved screeds mounted incontiguous walls of a room as supports for picture molding. Fig. l: is alike view of tne same screeds applied to the same walls as supports fora chair rail or casing. Fig. 5 is a similar view showing several of myimproved screeds, some of which are seated in the same walls as supportsfor base molding or mop-boards and others in a concrcte fioor assupports for floor joists.

My improved screed, whereof a specimen is shown separately in Figs. land 2, is denoted generally by the numeral 6. It is of wood or othersuitable material, and is formed from a single thin oblong block, orsolid blank of uniform cross section. It has two parallel sides oreclges 7, which are uniformly and symmetrically beveled from its widerback side 8 to its narrower front side 9, as shown. It has spacedlongitudinal channels 10, which are sunk in Specfication of LettersPatent.

Patentecl Mar. 12, 1918.

Serial No. 205,521.

the side 8 to a uniform depth approximately equal to half the thicknessof the block, and are preferably non-central in the sense of beingpartitioned apart by the' middle broad longitudinal side strip 23 behindor under the groove ll. To prevent warpin it has a central longitudinal;zroove 11 sunk in the front side to a uni form depth nearly equal toone-third the thickness of the block. Ithas in its front side thetransverse central channel 12, which is ot uniform depth andinter-communicates immediately with the channels 10. It has also neareach end of the screecl, a transverse square shoulder 13, formed byremoving from the front face of the blank suflicient material to uncoverthe channels 10.

The described screed is completely formed from the described blank bysubjecting the latter to two successive simple Operations which areperformed by running the blank first longitudinally through a moldingmachine and then crosswise through a gang dadoing machine. By runningthe blank through the molding machine the eclges 7 are beveled and thelongitudinal Channels 10 and groove 'll are e):- cavated; while byrunning the same transversely through the dadoing machine the crosschannel 12 is excavated 'and the ends of the blank are cut down andexcavated to form the shoulder-s 13. A plurality of screeds of this kindmay be formed end to end from a continuous blank strip of uniform CI'OSssection, and may be severed from each other, in the process ofmanufacture, by means of a circular saw of sullici ntdiameteiy mountedin the middle of the clado head. Then this convenient method is pursued,the adjacent shoulders 13 of abutting screeds are opposite side walls ofa transverse channel 22 formed partly and equally in each screed. lVhen.completely formed, the screeds should be dipped in creosote or otherpreservative before using.

The use of my improved screed in connection with vertical building wallsis illustrated in Figs. 3, l and 5; and in connection with horizontalflooring, in Fig. 5. Patches or deposits 14 of plaster of Paris orsimilar adhesive material are applied to the wall 21 as shown. To thesethe screeds are then applied with pressure toward the wall in positionswherein their faces 9 are fiush With the proposed face 15 of the plasterwhich is to be applied. By this pressure a portion of the adhesivematerial 14 is forced into the Channels 10 and 12 and the half Channels22, where it hardens and clenches the screeds permanently to the walls.Theplastering 15 is then applied to the wall 21 in the custonary nanner,so as to overlap the beveled edges of the screeds as well as all theeXposed surface of the hardened adhesive material. The moldings 16 arethen placed in position and Secured contactually to the screeds by thenails 17. Fig. 5 further illustrates the similar manner in which myimproved screeds are used in connection with a concrete floor 18 for thesupport of the joists 19 under the wooden floor 20.

I claim as my invention- 1. A building screed of the specified class,comprising an oblong block having noncentral longitudinal channels inone side thereof, a central longitudinal groove and a transverse channelin the opposite side thereof and openings from the longitudinal channelsinto the transverse channel.

2. A building screed of the specified class, formed of a thin oblongblock and comprising a plurality of longitudnal channels in the backside of the block, a central channel extending continuously across theface of the block, and opening immediately into each of the longitudinalChannels.

3. A building screed of the specified class, formed of a single oblongblock, and having two opposite beveled edges, longitudinal channels sunkin one side of the block, a

longitudinal groove and a transverse channel formed in the opposite sideof the block, and openings from the transverse channel into thelongitudinal Channels respectively.

As a new article of manufacture, a building screed of the specifiedclass, formed of an oblong block and comprising two beV- eled edges, aplurality of longitudinal cha-nnels in the back side of the block alongitudinal groove and a transverse channel which are formed in thefront side of the block, and openings from the longitudinal channelsinto the transverse channel.

5. A building screed of the specified class, formed of a single oblongblock, and having longitudinal channels in the back side thereof,terminal Channels and a central channel which are fol-med transverselyand continuously inthe front side of the block, and an opening from eachof the longitudinal channels into each of the transverse Channels.

VVitness my signature at Omaha, Nebraska, November th, 1917.

JOHN H. J OHNSON.

copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, I). C."

